The mommy-to-be and fiancé Ashton Kutcher visited with her parents Sunday in L.A., and Mila wasn't shy about putting her burgeoning baby bump out on display!

The 30-year-old Jupiter Ascending star wore a tight black tank top, drawing attention to her adorably protruding belly button. She paired her chic yet simple shirt with black sweats and flip-flops, throwing her up in a messy (but cute!) bun and wearing no makeup--just a pair of aviator shades to shield her face from the sun.

Ashton, 36, also looked pretty comfy for his visit with baby Kunis-Kutcher's future grandparents, too. The Two and a Half Men star wore gray sweats, a Chicago bears cap and sneakers.

Based on Mila's bump, you'd think she and Ashton would be expecting their little one sometime soon. But last month on The Ellen DeGeneres Show, the mommy-to-be coyly said her due date was "some time this year," adding jokingly, "I promise you. It will be this year!"

And when it does come time to deliver, Mila's planning to take the natural approach. In other words? No epidural! "I'm crazy," she said laughingly. "I did this to myself—I might as well do it right...I wanted this. It's like, no one made me do this."

Ellen was quick to point out she didn't get pregnant entirely by herself, to which Ashton's love responded cutely, "I did have a little help. Just a little bit!"

How adorable are the future Mr. and Mrs. Kutcher going to be with a kid?!